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  <head>
    <title>Google Docs API Quickstart</title>
    <meta charset="utf-8" />
  </head>
  <body>
    <p>
      Google Docs API Quickstart
    </p>
    <!--Add buttons to initiate auth sequence and sign out-->
    <button id="authorize_button" style="display: none;">Authorize</button>
    <button id="signout_button" style="display: none;">Sign Out</button>
    <pre id="content"></pre>

    <script type="text/javascript">
      // Client ID and API key from the Developer Console
      var CLIENT_ID = '838781193912-9st0pcct9fvq3psvotlkvikl0s4sh1cb.apps.googleusercontent.com'
      var API_KEY = 'AIzaSyBy67ZTTlQynyf8nSwsr_MAOU982LWF68E';

      // Array of API discovery doc URLs for APIs used by the quickstart
      var DISCOVERY_DOCS = [
        'https://docs.googleapis.com/$discovery/rest?version=v1&key=AIzaSyBy67ZTTlQynyf8nSwsr_MAOU982LWF68E'];

      // Authorization scopes required by the API; multiple scopes can be
      // included, separated by spaces.
      var SCOPES = "https://www.googleapis.com/auth/documents.readonly";

      var authorizeButton = document.getElementById('authorize_button');
      var signoutButton = document.getElementById('signout_button');

      /**
       *  On load, called to load the auth2 library and API client library.
       */
      function handleClientLoad() {
        gapi.load('client:auth2', initClient);
      }

      /**
       *  Initializes the API client library and sets up sign-in state
       *  listeners.
       */
      function initClient() {
        gapi.client.init({
        apiKey: API_KEY,
        clientId: CLIENT_ID,
        discoveryDocs: DISCOVERY_DOCS,
        scope: SCOPES
      }).then(function () {
        // Listen for sign-in state changes.
        gapi.auth2.getAuthInstance().isSignedIn.listen(updateSigninStatus);

      // Handle the initial sign-in state.
        updateSigninStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
        authorizeButton.onclick = handleAuthClick;
        signoutButton.onclick = handleSignoutClick;
        });
      }

      /**
       *  Called when the signed in status changes, to update the UI
       *  appropriately. After a sign-in, the API is called.
       */
      function updateSigninStatus(isSignedIn) {
        if (isSignedIn) {
        authorizeButton.style.display = 'none';
        signoutButton.style.display = 'block';
        printDocTitle();
        } else {
        authorizeButton.style.display = 'block';
        signoutButton.style.display = 'none';
        }
      }

      /**
       *  Sign in the user upon button click.
       */
      function handleAuthClick(event) {
        gapi.auth2.getAuthInstance().signIn();
      }

      /**
       *  Sign out the user upon button click.
       */
      function handleSignoutClick(event) {
        gapi.auth2.getAuthInstance().signOut();
      }

      /**
       * Append a pre element to the body containing the given message
       * as its text node. Used to display the results of the API call.
       *
       * @param {string} message Text to be placed in pre element.
       */
      function appendPre(message) {
        var pre = document.getElementById('content');
        var textContent = document.createTextNode(message + '\n');
        pre.appendChild(textContent);
      }

      /**
       * Prints the title of a sample doc:
       * https://docs.google.com/document/d/195j9eDD3ccgjQRttHhJPymLJUCOUjs-jmwTrekvdjFE/edit
       */
      function printDocTitle() {
        gapi.client.docs.documents.get({
        documentId: '195j9eDD3ccgjQRttHhJPymLJUCOUjs-jmwTrekvdjFE'
      }).then(function(response) {
        var doc = response.result;
        var title = doc.title;
        appendPre('Document "' + title + '" successfully found.\n');
      },function(response) {
        appendPre('Error: ' + response.result.error.message);
        });
      }
    </script>
    <script async="" defer="" onload="this.onload=function(){};handleClientLoad()" onreadystatechange="if (this.readyState === 'complete') this.onload()" src="https://apis.google.com/js/api.js"></script>
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